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Tag Archives: quantum gravity

As in 2013-2018, there will again a winter workshop in Tux. It will take place Feb 11 to 15, 2019. The aim is to bring together experts on loop quantum gravity and related topics, in the scenic village of Tux, in the Austrian alps.

In general, the topics of the workshop include
– All approaches to loop quantum gravity (e.g. canonical, covariant, GFT)
– Other approaches to quantum gravity and their relation to LQG
– LQG related quantum gravity phenomenology
– Quantum gravity topics of general interest

As opposed to previous years, there is no central topic.

*Registration:*

Please register your participation in the workshop by email to tuxworkshop@fuw.edu.pl as soon as possible, and before Dec 9, 2018.

Please send title and abstract of your proposed talk to tuxworkshop@fuw.edu.pl
The deadline for talk submission is Sunday, January 6, 2019, although earlier submission is strongly encouraged. Please also indicate your date of arrival and departure.

*Financial support:*
Unfortunately, this year we will very likely *not* have any financial support available for participants.

*Accommodation:*
Since most of the accommodation in Tux is in small guest houses and pensions, and the level of service – and prices – vary widely, it is impractical for us to book accommodation for everybody. Note that affordable accommodation tends to sell out quickly, it is advised to book soon. More information on accommodation and travel can be found on our website.

*Visa:*
Please note that we can not support visa applications in many cases. Please contact Hanno Sahlmann in case of doubt.

The 5th Conference of the Polish Society on Relativity will consist of two parts, devoted, respectively, to classical and quantum gravity.

The first part will cover mathematical structures in classical gravity, exact solutions of Einstein equations, physics of black holes, cosmological models, alternative models of gravity, and the research related to the recent detection of gravitational waves.

The second part will be devoted to discussion of basic tools of quantum gravity and noncommutative geometry, in particular quantum space-times, quantum phase spaces, and quantum symmetries. We will consider quantum gravity models e.g. LQG (loop quantum gravity), matrix models and discretized approach to Feynman description of quantized gravity and new approaches to string theory.

The notion of observer, which is quite a nuanced concept in quantum mechanics and in GR taken separately, can be expected to take a new meaning at the crossroads of those two theories, whatever the correct quantum theory of gravity will be.
We will gather a handful of experts in Quantum Foundations, Quantum Information Theory, Quantum Gravity and Philosophy of Physics, to discuss different aspects of the notion of observer, with an open mind regarding the particular framework or approach that each of us is pursuing, and trying to keep a focus on the conceptual and cross-disciplinary aspects.

This conference is mostly about quantum gravity and its intrinsic nonlocal feature, but also about general gravitational theories beyond Eisntein’s gravity, black holes, cosmology, and observational tests.

It is well known that any fundamental theory is nonlocal at the quantum level, namely the quantum effective action is a “very nonlocal” functional. Moreover, quantum mechanics itself is intrinsically nonlocal. Furthermore, when we try to construct a consistent theory for quantum gravity non locality turns out to be unavoidable. Indeed, in our days we have several consistent proposals for quantum gravity: String Theory, Loop Quantum Gravity, Nonlocal Quantum Gravity, Asymptotically Safe Quantum Gravity, etc., and all of them are nonlocal. In this conference we will try to make the point of the current understanding of several approaches to quantum gravity with particular attention to the locality paradigm at short distance. In particular we will try to point out issues and ways to overcome them.

However, besides the fundamental theoretical problems, other topics of the conference are about the spacetime singularitys’ issue, black holes at the classical and quantum level, the information loss problem, and the cosmological implications at short and large distance of a large class of local and nonlocal gravitational theories.

A small number of vacancies is still available at this summer’s school on numerical methods in quantum gravity, aimed primarily at PhD students and postdocs in the field. If you are interested, please register as soon as possible via the school’s website.

This book provides readers with a simple introduction to loop quantum gravity, centred on its covariant approach. It focuses on the physical and conceptual aspects of the problem and includes the background material needed to enter this lively domain of research, making it ideal for researchers and graduate students. Topics covered include quanta of space; classical and quantum physics without time; tetrad formalism; Holst action; lattice QCD; Regge calculus; ADM and Ashtekar variables; Ponzano-Regge and Turaev-Viro amplitudes; kinematics and dynamics of 4D Lorentzian quantum gravity; spectrum of area and volume; coherent states; classical limit; matter couplings; graviton propagator; spinfoam cosmology and black hole thermodynamics.

The Beijing Normal University (BNU) International Summer School on Quantum Gravity is intended to provide a pedagogical introduction for graduate students and young post-docs to the main fields closely related to loop quantum gravity.

The working language is English. But participation is limited. Students and young post-docs who are interested to attend the school are invited to look up the registration information and register at the website:

Travel support for U.S. Students and Post-docs to attend the 2nd BNU School on Quantum Gravity

The 2nd Beijing Normal University School on quantum gravity will take place from August 13th to August 18th, 2012. Although the hosts of the school will be able to partially cover local costs of attendees, they will not be able to cover all costs. Because of this, we have applied for, and will likely receive, NSF funds to provide partial travel support to a number of U.S. students and beginning post-docs to attend this school. We expect to be able to cover at least half the plane fare of the selected applicants.

Interested young researchers should send a CV, list of publications and, if a student, a recommendation letter from your advisor, to jonathan.engle[AT]fau.edu, no later than Friday, May 18th, 2012. In the email, please also indicate whether you have access to other funding sources, and, if so, which ones. The final selection will be made by a committee consisting of scientists from three different universities.

The organizers of the BNU school have graciously agreed to accept the selected participants. Nevertheless, it is still necessary for students to register and request partial support for local costs directly at the main school website http://physics.bnu.edu.cn/summerschool, in addition to applying for this NSF support.

We invite you to read-for-free the CQG focus section reviewing 25 years of quantum gravity research.

http://iopscience.iop.org/0264-9381/28/15

This issue features 2 invited review articles from physicists who have been associated with String Theory and Loop Quantum Gravity from their inception. They were invited to write a retrospective review: What were the initial hopes? To what extent have these hopes been realised? What were the major successes, surprises, disappointments? The emphasis is on what has come OUT of the program rather than technical developments internal to the program. We hope that the reader, whatever her persuasion, will be able to form a panoramic view of quantum gravity research today within these two programmes.